Update, mine was hard to get at, the pump assembly was mounted with the Plexiglas cover facing forward and the adjusting nut and screw were facing in toward the frame. I could see the lights from an angle though. The big issue I had was the control module was not bolted down properly. After I bolted it down I found it easier to loosen the module and adjust it at the mounting point. All is good now, before I secured it properly I am sure the setting was changing every time I moved.
Wayne & Kathy
05 Alpine 40FDQS #75330 Towing 24' car hauler, 2012 Spyder, 2003 Harley FatBoy